Specification of Richard Smith
Subtitle: treating sewage and ventilating sewers
Publisher: Great Seal Patent Office
Published: 1865
Place of publication: London
Language: eng
Subjects: Sewage; Sewerage; Ventilation; Disinfection and disinfectants; Smoke prevention
Notes: Cover title.

At head of title: A.D. 1865, 16th February. No. 451.

"Richard Smith, of Cumming Street North Pentonville, in the county of Middlesex".